1.7.2 forge not launching issue

[gunboy001]

Hello,

I was making a simple modpack for 1.7.2 to play with friends, i decided to make it 1.7.2 because it's lighter and because the base mod's 1.7.10 version is under development (lambdacraft). I used multiMC for it did all but in the launching opens the console and after a few seconds it returns to the multiMC window without launching minecraft, can somebody help me?

P.S. : I red the EQA

Forge version: 10.12.2.1121

fml-client-latest log:  [15:04:42] [main/INFO] [FML/]: Forge Mod Loader version 7.2.211.1121 for Minecraft 1.7.2 loading

[15:04:42] [main/INFO] [FML/]: Java is Java HotSpot 64-Bit Server VM, version 1.8.0_31, running on Windows 8.1:amd64:6.3, installed at C:\Program Files\Java\jre1.8.0_31

[15:04:42] [main/DEBUG] [FML/]: Java classpath at launch is C:/Users/Utente/Desktop/MultiMC/jars/NewLaunch.jar

[15:04:42] [main/DEBUG] [FML/]: Java library path at launch is C:/Users/Utente/Desktop/MultiMC/instances/hlpack/natives

[15:04:42] [main/DEBUG] [FML/]: Enabling runtime deobfuscation

[15:04:42] [main/DEBUG] [FML/]: Instantiating coremod class FMLCorePlugin

[15:04:42] [main/DEBUG] [FML/]: Added access transformer class cpw.mods.fml.common.asm.transformers.AccessTransformer to enqueued access transformers

[15:04:42] [main/DEBUG] [FML/]: Enqueued coremod FMLCorePlugin

[15:04:42] [main/DEBUG] [FML/]: Instantiating coremod class FMLForgePlugin

[15:04:42] [main/DEBUG] [FML/]: Added access transformer class net.minecraftforge.transformers.ForgeAccessTransformer to enqueued access transformers

[15:04:42] [main/DEBUG] [FML/]: Enqueued coremod FMLForgePlugin

[15:04:42] [main/DEBUG] [FML/]: All fundamental core mods are successfully located

[15:04:42] [main/DEBUG] [FML/]: Discovering coremods

[15:04:42] [main/DEBUG] [FML/]: Examining for coremod candidacy appliedenergistics2-rv0-stable-4.jar

[15:04:42] [main/TRACE] [FML/]: Found FMLCorePluginContainsFMLMod marker in appliedenergistics2-rv0-stable-4.jar, it will be examined later for regular @Mod instances

[15:04:42] [main/DEBUG] [FML/]: Instantiating coremod class AppEngCore

[15:04:42] [main/WARN] [FML/]: The coremod appeng.transformer.AppEngCore does not have a MCVersion annotation, it may cause issues with this version of Minecraft

[15:04:42] [main/INFO] [FML/]: [AppEng] Core Init

[15:04:42] [main/DEBUG] [FML/]: Added access transformer class appeng.transformer.asm.ASMTweaker to enqueued access transformers

[15:04:42] [main/DEBUG] [FML/]: Enqueued coremod AppEngCore

[15:04:42] [main/DEBUG] [FML/]: Examining for coremod candidacy CodeChickenCore-1.7.2-1.0.2.12-universal.jar

[15:04:42] [main/TRACE] [FML/]: Adding CodeChickenCore-1.7.2-1.0.2.12-universal.jar to the list of known coremods, it will not be examined again

[15:04:42] [main/DEBUG] [FML/]: Instantiating coremod class CodeChickenCorePlugin

[15:04:42] [main/WARN] [FML/]: The coremod codechicken.core.launch.CodeChickenCorePlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft

[15:04:43] [main/DEBUG] [FML/]: Added access transformer class codechicken.core.asm.CodeChickenAccessTransformer to enqueued access transformers

[15:04:43] [main/DEBUG] [FML/]: Enqueued coremod CodeChickenCorePlugin

[15:04:43] [main/DEBUG] [FML/]: Examining for coremod candidacy CodeChickenLib-1.7.2-1.1.1.92-universal.jar

[15:04:43] [main/DEBUG] [FML/]: Not found coremod data in CodeChickenLib-1.7.2-1.1.1.92-universal.jar

[15:04:43] [main/DEBUG] [FML/]: Examining for coremod candidacy enderio-2.0_beta.123.jar

[15:04:43] [main/DEBUG] [FML/]: Not found coremod data in enderio-2.0_beta.123.jar

[15:04:43] [main/DEBUG] [FML/]: Examining for coremod candidacy EnderStorage-1.7.2-1.4.4.8-universal.jar

[15:04:43] [main/DEBUG] [FML/]: Not found coremod data in EnderStorage-1.7.2-1.4.4.8-universal.jar

[15:04:43] [main/DEBUG] [FML/]: Examining for coremod candidacy gregtech-1.7.jar

[15:04:43] [main/DEBUG] [FML/]: Not found coremod data in gregtech-1.7.jar

[15:04:43] [main/DEBUG] [FML/]: Examining for coremod candidacy industrialcraft-2-2.1.484-experimental.jar

[15:04:43] [main/TRACE] [FML/]: Found FMLCorePluginContainsFMLMod marker in industrialcraft-2-2.1.484-experimental.jar, it will be examined later for regular @Mod instances

[15:04:43] [main/DEBUG] [FML/]: Instantiating coremod class IC2core

[15:04:43] [main/WARN] [FML/]: The coremod ic2.core.coremod.IC2core does not have a MCVersion annotation, it may cause issues with this version of Minecraft

[15:04:43] [main/DEBUG] [FML/]: Enqueued coremod IC2core

[15:04:43] [main/DEBUG] [FML/]: Examining for coremod candidacy InventoryTweaks-1.58-147.jar

[15:04:43] [main/TRACE] [FML/]: Found FMLCorePluginContainsFMLMod marker in InventoryTweaks-1.58-147.jar, it will be examined later for regular @Mod instances

[15:04:43] [main/DEBUG] [FML/]: Instantiating coremod class FMLPlugin

[15:04:43] [main/WARN] [FML/]: The coremod invtweaks.forge.asm.FMLPlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft

[15:04:43] [main/DEBUG] [FML/]: Added access transformer class invtweaks.forge.asm.ITAccessTransformer to enqueued access transformers

[15:04:43] [main/DEBUG] [FML/]: Enqueued coremod FMLPlugin

[15:04:43] [main/DEBUG] [FML/]: Examining for coremod candidacy LambdaCraft-1.8.jar

[15:04:43] [main/DEBUG] [FML/]: Not found coremod data in LambdaCraft-1.8.jar

[15:04:43] [main/DEBUG] [FML/]: Examining for coremod candidacy LIUtils-1.7.2.321.jar

[15:04:43] [main/DEBUG] [FML/]: Not found coremod data in LIUtils-1.7.2.321.jar

[15:04:43] [main/DEBUG] [FML/]: Examining for coremod candidacy malisiscore-1.7.2-0.9.1.jar

[15:04:43] [main/TRACE] [FML/]: Adding malisiscore-1.7.2-0.9.1.jar to the list of known coremods, it will not be examined again

[15:04:43] [main/DEBUG] [FML/]: Instantiating coremod class MalisisCorePlugin

[15:04:43] [main/WARN] [FML/]: The coremod net.malisis.core.asm.MalisisCorePlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft

[15:04:43] [main/DEBUG] [FML/]: Enqueued coremod MalisisCorePlugin

[15:04:43] [main/DEBUG] [FML/]: Examining for coremod candidacy malisisdoors-1.7.2-1.0.2.jar

[15:04:43] [main/DEBUG] [FML/]: Not found coremod data in malisisdoors-1.7.2-1.0.2.jar

[15:04:43] [main/DEBUG] [FML/]: Examining for coremod candidacy NotEnoughItems-1.7.2-1.0.2.34-universal.jar

[15:04:43] [main/TRACE] [FML/]: Adding NotEnoughItems-1.7.2-1.0.2.34-universal.jar to the list of known coremods, it will not be examined again

[15:04:43] [main/DEBUG] [FML/]: Instantiating coremod class NEICorePlugin

[15:04:43] [main/WARN] [FML/]: The coremod codechicken.nei.asm.NEICorePlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft

[15:04:43] [main/DEBUG] [FML/]: Enqueued coremod NEICorePlugin

[15:04:43] [main/DEBUG] [FML/]: Examining for coremod candidacy Railcraft_1.7.2-9.1.0.0.jar

[15:04:43] [main/DEBUG] [FML/]: Not found coremod data in Railcraft_1.7.2-9.1.0.0.jar

[15:04:43] [main/DEBUG] [FML/]: Examining for coremod candidacy Waila-1.5.2a_1.7.2.jar

[15:04:43] [main/DEBUG] [FML/]: Not found coremod data in Waila-1.5.2a_1.7.2.jar

[15:04:43] [main/INFO] [LaunchWrapper/]: Loading tweak class name cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker

[15:04:43] [main/INFO] [LaunchWrapper/]: Loading tweak class name cpw.mods.fml.common.launcher.FMLDeobfTweaker

[15:04:43] [main/INFO] [LaunchWrapper/]: Calling tweak class cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker

[15:04:43] [main/ERROR] [LaunchWrapper/]: Unable to launch

java.util.ConcurrentModificationException

at java.util.ArrayList$Itr.checkForComodification(Unknown Source) ~[?:1.8.0_31]

at java.util.ArrayList$Itr.remove(Unknown Source) ~[?:1.8.0_31]

at net.minecraft.launchwrapper.Launch.launch(Launch.java:117) [launchwrapper-1.9.jar:?]

at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.9.jar:?]

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_31]

at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_31]

at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_31]

at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_31]

at org.multimc.onesix.OneSixLauncher.launchWithMainClass(OneSixLauncher.java:310) [NewLaunch.jar:?]

at org.multimc.onesix.OneSixLauncher.launch(OneSixLauncher.java:394) [NewLaunch.jar:?]

at org.multimc.EntryPoint.listen(EntryPoint.java:170) [NewLaunch.jar:?]

at org.multimc.EntryPoint.main(EntryPoint.java:54) [NewLaunch.jar:?]

(I know it's long sorry  )

[gunboy001]

I tryed to solve updating forge like the eqa says for java.lang.ConcurrentModificationException or java.util.ConcurrentModificationException but it didn't solve the problem.

P.S. : yep i failed reading the eqa first sorry I am so dumb